CN1033009A - Disposable syringe - Google Patents

Abstract

The present invention proposes a kind of disposable syringe, machinery wherein only allows plunger to retreat once to come the inspiration medicament and advances once to come injection medicament, and later mechanism just can't re-use.This machinery also is suitable for being attached on the existing ordinary syringe very much.

Description

Disposable syringe

The present invention relates to disposable syringe; Further specifically, relate to be equipped with fixed needle, be inflexible syringe basically, hard flute shape part or disk are housed in the syringe, interaction by the part that relatively moves, plunger can only once be moved back and forth, block then, syringe can't reuse.

Normally used syringe, though require only to use once, its structure allows them to reuse.Want to make real of these syringes to use once, can destruction process depend on user fully and fulfil the duty under the strict control condition then.

Under the condition of suitably not managing, for example outside hospital and clinic, syringe is fallen those and can not properly be used in syringe people's the hands, be used for injecting illegal drug, does not do suitable sterilization and just is used for injecting two or more people.

Except those exhausted syringes forward in other staff and are used to inject illegal, the dangerous drugs from legal entity, do not make the media that suitable disinfectant syringe also may become diseases such as infecting HIV virus (AIDS) and hepatitis B.

Being used for of having proposed prevents that the reusable a kind of way of syringe from being: medicament fill (the only suitable doses of its capacity) in a flexible pipe that can damage voluntarily, flexible pipe is extruded flat when injection medicament.

But not all medicament all is fit to fill in advance becomes a doses.Some medicament is wished fill in multiple-dose container, and is so comparatively economical, injects with disposable syringe or the nonexpondable syringe of energy disinfectant then.

As one of existing device that solves above-mentioned repeated use syringe problem with various forms, 2,618, No. 263 United States Patent (USP)s investing people such as clarke sand November 18 nineteen fifty-two are arranged, this patent proposes to have an injection bottle near the inner end of pin, in be equipped with and survey measured medicament in advance.When injection bottle pressurizes, pin pierces into injection bottle, and medicament penetrates, and whole injection device is just discarded.

4,013, No. 073 United States Patent (USP) investing Cunningham's skink on March 22nd, 1977 has proposed a kind of contractile disposable syringe, and when penetrating medicament when the hose wall pressurized, two tube walls fit together, thereby this injection device can't be reused.

4,022, No. 206 United States Patent (USP)s investing people such as Xi Laiman on May 10th, 1977 have proposed a kind of method and apparatus of depositing and injecting lyophilizing disease Seedling, and this also is the pre-manner of packing of a kind of single dose, but does not take measures to prevent to reuse.

4,391, No. 273 United States Patent (USP)s investing Qi Kuie-A Liasi application July 5 nineteen eighty-three have proposed a kind of rigid syringe, and a pin is housed on the syringe inner plunger, just the bottom of socket are pierced through when injection process finishes hour hands.This patent has also proposed another kind of method, and a cutter is arranged in the syringe, and cutter can not cut socket when syringe barrel travels forward; If but want that the socket inner plunger to rear axle or want to reuse syringe, pocket knife is just cut the socket sidewall.

4,548, No. 601 United States Patent (USP)s investing the Larry on October 22nd, 1985 have proposed the combination type syringe that a kind of wrapped medicament is used, and it has an internal layer Soft Roll capsule and an outer Soft Roll capsule; When injection finishes, internal layer Soft Roll capsule breakage under the atmospheric pressure effect.

This patent proposition is a kind of to prevent reusable disposable syringe with mechanical means.

First purpose of the present invention is to propose a kind of simple in structure, low price and can prevent reusable disposable syringe automatically.

Second purpose of the present invention is to propose a kind of low-cost flute shape thing or disk, flute shape thing or disk are placed on the plunger axis top of common plastics system syringe, they allow to do a reverse movement makes syringe irritate upward medicament, do a forward travel and come injection medicament, plunger just is stuck after finishing above-mentioned twice motion, prevents to reuse.

The 3rd purpose of the present invention is to propose a kind of low-cost device, and crossing once at injector to inject, the back just can't re-use.

The 4th purpose of the present invention is to propose a kind of device, uses the syringe of the later same capability of this device just can adorn filling and the not commensurability medicament of injection, thereby can reduce the specifications and models of syringe.

Fig. 1 is to use typical syringe sketch map of the present invention.

Fig. 2 is equipped with the plunger of disposable syringe of the present invention and the glycerol flesh of socket assembly

Fig. 3 be among Fig. 1 along the profile of 3-3 line, the figure invading the exterior is illustrated in the position of the disk of syringe before using.

Fig. 4 is similar to Fig. 3, has just adorned in the buret of syringe and has irritated medicament.

Fig. 5 is also similar to Fig. 3, and wherein medicament has been injected, and plunger has been stuck in the top of buret.

Fig. 6 is the profile of plunger and disk, represents the interaction of each part.

Fig. 7 is the front elevation of the disk of the present invention of another kind of structure.

Fig. 8 is the view of second kind of organization plan of the present invention, and flute shape part is housed in syringe.

Fig. 9 is the right-angle view that is placed on the flute shape part of the present invention outside the syringe.

Figure 10 is the bottom view of neoteric flute shape part among Fig. 8.

Figure 11 is the perspective view of flute shape part of the present invention when being in the operating position shown in Fig. 8-10.

Figure 12 represents to be used for realizing the steel wire of the object of the invention and the relative position of injection piston.

Figure 13 is the profile along Figure 12 13-13 line.

Figure 14 is the side view of steel wire among Figure 12.

Figure 15 is for reaching the another kind of schematic representation of apparatus of the object of the invention.

Figure 16 is the side view of device shown in Figure 15.

Introduce optimum implementation of the present invention below.

As shown in Figure 1, product of the present invention is a kind of duroplasts syringe of being made up of following each several part: syringe is responsible for 2, the evagination shape of using for ease of injection medicament is gone up disk 4, also will introduce this back as the top cover 6(of the outer end of plunger), and the entry needle 8 that stretches out from front end 7.

Referring to Fig. 2, the top cover 6 that is in this figure bottom is connected with plunger rod 10 below, or makes an integral body with plunger rod.Plunger rod 10 general one-tenth X-shaped structures, 12 one-tenth decussations of two legs, there is the cylindrical member 14 of connection the center.At the opposite end of top cover 6, also have piston 16 and sealing member 18 as the plunger ingredient.Near the plunger middle part, one section injection person in charge 2 and disk of the present invention 20 have drawn in this figure.On the disk 20 of the present invention, a central openings 22 is arranged, several radial notches 24 are arranged, also have the outstanding needle point of plurality of outward (or claiming demilance) 26 so that allow leg 12 pass through so that allow cylindrical member 14 pass through; These will do more detailed introduction in the back.The medial side part 22 and 24 that contacts with plunger axis 10 is setovered, and this can see clearlyer from Fig. 6, therefore can have no basically to hinder in a direction two abutment relative motioies, and motion just can make disc 20 imbed in the plunger axis yet do in the other direction.Equally, the demilance of evagination or arrow 26 can easily move along the inwall of syringe 2 in a direction, but as want that the inwall that doing moves will make demilance 26 and syringe 2 collides in the other direction.

Obviously, if disk uses rustless steel and so on stiff materials, and syringe itself uses plastic material, will make syringe very handy.The nonhomogeneous hardness of two kinds of materials, disk 20 is imbedded than soft material can't be moved again, thereby stops further relative motion.

Referring to Fig. 3, this is the profile of syringe below, is unkitted syringe needle on the syringe, is empty in the pipe, but can use.Can see: piston 16 is very close with syringe nozzle 7, and disk 20 is in inner chamber rear portion certain distance, when the piston post-tensioning is located to the disk place.A certain amount of medicament is with regard in the inspiration syringe.Because short 26 inwalls that imbedded syringe that give just prevent to move behind the hoop.But plunger can also move along this direction.

It should be noted that: by doing initial adjustment, apparatus of the present invention can be regulated injected dose easily.

In the syringe of the present invention among Fig. 4, piston 16 is arrived and disk 20 position adjacent by post-tensioning, has poured into medicament in the syringe, because the needle point of disk 20 has embedded the inwall of syringe 2, syringe just prevents that disk from moving backward again.

Syringe in Fig. 5, medicament has been injected, and travelling forward of plunger 10 also taken disk 20 to front position, and piston 16 is stuck in the front end of syringe 2.Drive lower disc at plunger moves forward.If rethink this moment plunger is moved backward, just can make each tip on the disk imbed the inwall of syringe 2 again, thereby can not move backward once more.

Referring to Fig. 6, wherein disk is stuck between the medial wall and plunger axis of syringe 2, and the latter is made up of leg 10 and central cylindrical member 14.From figure, can know and find out, upward prominent demilance (or arrow) the 26th, as the terminal part that upwarps panel 28, upper fin panel 28 sweep 29 places with on prominent main component 30 join Jia smile shin   ァ

See Fig. 7 below, this is the plane graph of disk, it should be noted that wherein needle tip 26,28 usefulness camber members 32 couple together, and also increases the flexible of ring with weight reduction.Right-hand at Fig. 7 has a notch 34 on the camber member 32, this is for the ease of ring is installed on the plunger.

Fig. 8,9,10 and 11 has represented another kind of scheme of the present invention, has wherein replaced disk with flute shape part.The advantage of this a kind of organization plan is that flute shape part is put in the standard syringes easily in process of production or afterwards, thereby can reach following purpose, plunger is withdrawn backward, in a certain amount of medicament inhalation syringe, promote plunger during use and penetrate medicament, flute shape part also prevents the plunger inspiration medicament of withdrawing once more.

Fig. 9 is the plane graph of second embodiment of the invention, and wherein thin metal flute shape part is made of leg 30,32 and the body 34 of receiving waist slightly.Above whole flute shape part, a notch 40 is arranged between the leg, notch is downward always, has at lower end to reduce the arc port 42 that stress is used.

Figure 10 is the end-view of flute shape part, can see that wherein leg 30 and 32 tilts laterally, meets at right angles each other, fines away at upper end, also has chisel edge 36 and sharp pawl 38 on the leg.

From Fig. 8 and Figure 11 as can be seen, the flute shape part of restriction usefulness is placed between the leg 12 of the medial wall of body of syringe 2 and plunger; Between chisel edge 36 and the Gui Sai leg 12 when a direction is made relative motion, chisel edge 36 just penetrates leg 12, and makes relative motion at other direction between them, then has no basically to hinder.So just can be pumped into syringe to the plunger post-tensioning to medicament, the flute shape part that is imbedded the sidewall of syringe 2 up to the piston shown in Fig. 2 16 stops and can't further outwards move.In injection process, the chisel edge 36 of flute shape part can be embedded on the leg 12 of plunger, and along with plunger axis moves down, intact up to drug injection.If rethink plunger is moved backward, then the sharp pawl on the flute shape part will pierce into the sidewall of syringe 2 once more, so move after can't be once more.

Referring to Figure 12, express another kind of organization plan of the present invention among the figure below.In this scheme, used a steel wire, it is shaped as the U-shaped of distortion, and steel wire bottom 50 is bent unanimous on the wholely with the shape of the sidewall V-arrangement intersection of plunger, and two extending parts 52 of steel wire are outward-dipping, the top of each extending part is sharpening all, forms chisel edge 54; Above-mentioned U-shaped steel wire is placed between syringe inwall and the plunger leg, and it just can play the similar effect of being introduced to Fig. 8-11 of restricted flute shape part.

Figure 15 and Figure 16 below, these two figure have introduced another organization plan of the present invention, and wherein restriction device is made of plastic, and just this kind plastics are harder than the plastics of making syringe.Substantially, the occupation mode of this restriction device is to above-mentioned similar, it becomes cloverleaf, the camber member that connects Herba Medicaginis leaf is that the flexibility that approaches is with 60, each band couples together with diamond connector 62 at interface point, the diamond connector is a complete reinforcement protruding part 64, and each protruding part is made up of four triangular side walls 66.If want to make plunger to move with respect to the sidewall of syringe, the moment that will bend, then diamond connector 62 just pierces into the medial wall or the plunger of syringe, thus the diamond connector just can stop plunger to move.

From on can find out that the present invention proposes a kind of method with low cost, it can make common syringe into can only expendable syringe. In addition, use the present invention can also only need to change the position of some device of syringe, make the syringe of same specification can inject the medicament of different amounts.

Claims (8)

1, a kind of disposable syringe of forming by following part:

An oval cylindrical tube,

Be contained in the aforementioned tube and can make axially movable plunger,

Seal the injection nozzle of aforementioned tube one end,

Become one with above-mentioned plunger, and stretch out the excellent bar of the cylindrical tube other end,

Be contained in the control device in the cylindrical tube, it can only once move back and forth plunger.

2, the syringe that requires according to claim 1, wherein injection nozzle is an entry needle.

3, the syringe that requires according to claim 1, wherein control device is a cushion disk(-sc) or a flute shape part that is placed on the plunger, they only can the phase motion of plunger in a direction, and contacts with the inwall of cylindrical tube.

4, thereby a kind of energy and plastic injector are used and can regulate the device of injected dose selectively; This device is real bite aquatic foods and encircle fat fan's posthumous title   push away the ㄗ ⑸ Gan saddle cloth that expands try to gain the posthumous title  Lai of singing try to gain the fine and soft ⑸ Gan of small house    medicated cap Da herd celestial assorted refute Mu Muxian shoot a glance at Mulberry  rinse fontanel ㄐ witch speech turn round and look at  macerate  ⑸ rainwater in puddles lettuce criticize sb's faults frankly the happy strange   Po of an ancient wind instrument lush says say small house   Xi servant  in fact in a difficult position fat looks small house  be coated with the quiet ⑸ Gan of tip edge Gu ilium and closely question the bright person of outstanding talent of capsule ┘

5, the device that requires according to claim 4, wherein plug-in unit is a flute shape part.

6, require 4 devices that require according to the power leather, wherein plug-in unit is the steel wire of a bending.

7, the device that requires according to claim 4, wherein plug-in unit is a disk.

8, the device that requires according to claim 4, wherein plug-in unit is made up of the diamond device that several interconnect.

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